Hi all
I've got a misfire on cylinder 3 & have noticed that when I undo the fuel filler cap there is a hiss of air. I'm assuming that something is blocked & air is not getting into the tank as I'm using diesel, therefore creating a vacuum in the tank. Would this cause the misfire & why would it only be on 1 cylinder?
I've already changed the injector loom as that was the cheapest possible cause of the misfire & was got before I noticed the hiss. This hasn't solved the issue.
Any help greatly appreciated.